Walter



C. S. BOOKWALTE R AND F. A. DAUBIN. SUBMARINE SIGNALING APPARATUS.

APPLICATION FILED AUG. 23 1917.

1,313,785. I Patented Aug. 19, 1919.

STATE 1 ES s. BOOKWALTER AND rnnnnaun a. na or wasmrreron', nrsrnrcr or cor.puma,=

SUIBMARINE SIGNALING- APPA TVS.

Specification of Letters Patent.

To all whom it may concern:

Be it known that we,

A. DAUBIN, citizens WALTER and FREELAND CHARLES S. Boonof the United States, residing at Washington, District of Columbia,

have invented cerhereby declare clear, and exact the following to be description of the invention,

a full,

such as will enable others skilled in the art to which it appertains same.

to make and use the Our invention relates to Improvements in signaling submarines; and 1t 1s apparatus, intended for use on intended to provide an apparatus which may be safely used to signal from the submar but it may also be used ing purposes when the surface.

ine when submerged, for ordinary signalsubmarine is on the Our invention will be more clearly understood after reference to the accompanying drawings, in which:

Figure 1 shows a section through the conning tower and adjacent portions of the submarine, showing the two periscopes and the signaling arrangement in elevation.

Fig. 2 is a view seen from the front of the conning tower, parts being broken away.

Fig. 3 shows a of the signaling terior portions of the elevation, and parts are figure.

Fig.

section throu apparatus, with the exh the tube apparatus shown in broken away in this 4 shows a section along the broken line 4- of Fig. 3, and looking down; and Fig. 5 is a diagram showing the electrical connections.

A represents the hull of the submarine,

which may be of any and provided with desired construction the conning tower B C represents the framework projecting above the deck of the submarine, braces the front and rear perlscopes D, and E representswhich D and the signaling tube forming part of the signaling apparatus, which may also be conveniently braced by the framework C.

This tube preferably projects above the periscopes, or any portion of the submar ne, and should be of suflicient strength to wlthstand the pressure of submarine 1s submerge and also to wlthstand the water when the d to the full depth; the pressure of the Patented n as, rare.

, Application filed August 23,1917. serial Rio. 137317.

water when the submarine is running at full speed submerged.

This tube may be turned in azimuth b means of the worm e and the worm gear-'e and it may be raised or lowered through the. stufling box e if desired.

The details of the signaling apparatus are shown in Figs. '3 and a, in which 1 represents the lamp chamber in which is mounted the lamp 2, which lamp is preferably provided with a reflector 3. This reflector may be made of thick metal to carry ofi the heat from the lamp and prevent'excessive heating. The electric current is supplied through the flexible cable 4.

In the bottom of the lamp chamber is a to concave or mangin mirror 5, adapted to refleet the rays from the lamp upward, and the lamp is mounted on a bracket 6, which is provided with a sliding member 7 having a screwthreaded stem 8 engaging the screw 9, which may be turned. by means of the hand wheel 10.

This lamp chamber is hinged, as at 1, to the tube 12, and on the opposite side it is securedto said tube by means of the swinging bolt 13 and butterfly nut 14a, so that the lamp chamber may be swung to the open position, if desired, for purposes of inspection or repair, and may be securely clamped in the closed position.

The tube 12 is preferably in the form of a truncated cone, and carries near its bottom one or more convex or collecting lenses 15; and near its upper end it is provided with one or more concave lenses 16 to paral- W lelize the rays.

with an opening closed by the glass plate 23..

The tube 12 and 17, and the head piece 18, and all the parts carried thereby, should be thoroughly packed and made impervious to water, even when, the submarine is submerged. to the maximum depth.

The electric mains are inclosed in the conduits 30 connected to the junction box 31, which is connected by the cable 32 to the key which is inclosed in the key box 33, which is normally closed'by the cover 34rand butterfly nuts '35.

The current may be turned on and oil by means of the switch 36. I

In the diagram of electrical connections shown in Fig. 5, the electric mains are indicated by 41 and 42, which are connected to the junction box 31 and the conductor 43 leads to the key 44, while the conductor 45 leads to the lamp 2. The key 44: is the ordinary telegraph key, and the signals are flashed by making and breaking the circuit with said key, as will now be described.

' The lamp will ordinarily be dark, but when the circuit is closed by pressing on the key 44, the lamp will glow, and, the rays will be reflected from the mirror 5 through the lenses 15 and l6, and will be delivered to the plane mirror 22, whence they will be reflected through the glass disk 23.

By using any of the dot and dash codes,

such as the Morse system, any signal may be YVhiIe' We have shown the lenses and mirrors in the simplest form, it will be evident that the lenses l5 and 16 may be omitted, and the light transmitted from the mirror 5 to the mirror 22. Moreover, the arrangement of the lenses may be varied to suit well known optical conditions, within 4 having been answered by the surface vorwar the scope of our invention.

Furthermore, the lamp may be arranged in the horizontal position instead of the vertical, if desired. Also, an arc lamp may be used instead of an incandescent lamp, under certain conditions. v 1

It will be noted that the herein described apparatus afl'ords a means of making a visible signal by means of a flash-light, while the submarine is submerged, to a vessel on the surface, or to an observer on the shore.

By means of this apparatus a submarine, operating submerged, sighting through her periswpes a friendly ship on the surface, can make any predetermined or regulation recognition signal to a surface vessel, or war vesk sel, without the submarine exposing its hull to gun fire or other destruction, at a'greater distance than the surface vessel or war vessel can see the submarines periscope, either in daytime or night time. The signal vessel, and the answer seen by. the submarine through her periscopes, the identity of the submarineis established, and she can come to the surfacewithout exposing her bull to un fire or other destruction-from the sur ace vessel or war vessel;

By means of this apparatus a submarine operating submerged can send signals, and

thereby communicate or transmit information or orders to a surface vessel.

()r a submarine operating submerged can send signals or transmit orders to an enemy merchant vessel, Without coming to the surface and exposing her bull to gun fire or other destruction from the enemy merchant vessel.

By means of this apparatus a submarine operating submerged can transmit signals to another submarine operating submerged, but having her Periscope out to receive the signals.

Or a submarine operating on the surface can transmit signals to any other vessel on the surface.

Among the advantages of a signaling apparatusof this form are:

(a) It may be operated while the hull of the submarine is submerged.

(b) All parts exposed to the sea pressure are water-tight and pressure proof.

(0) By means of its shape and construction very little resistance is added to the resistance of the submarine when propelled through the water.

(0?) Since the lamp is situated Within the conning tower or central operating compartment of the submarine, it can be renewed or adjusted when the submarine is submerged, and the personnel of the submarine may know positively that the lamp is burning, which they would not know if a pressure proof and water-tight light Were .located outside the hull of the submarine.

(e) The recognition and signal lamp can be trained in any direction so as to bear on any ship with which it is desired to communicate.

Having thus described our invention, What We claim and desire to secure by Letters Patent of the United States is:

1. Signaling apparatus for use on submarines, comprising a tube projecting above the top of the submarine with means for turning said tube in azimuth,- a lampchamber mounted beneath said tube, an electric 2. Signaling apparatus for use on sub-' marines, com-prising a tube projecting above the top of the submarme with means for turning said tube in azimuth. lenses mounted in said tube, alamp chamber mounted beneath said tube, an electric lamp and a mirmi in said lamp chamber, a head piece secured over the top of said tube and provided with a mirror and an opening opposite said mirror with a glass plate closing said opening, and means for makingand breaking the electric circuit-through said lamp, subscribed.

stantially as described.

3. Signaling apparatus for use on submarines, comprising a tube projecting above the top of the submarine withmeans for turning said tube in azimuth, a lamp chamber removably mounted beneath said tube, an electric lamp and a concave mirror in said lamp chamber, below said lamp, a head piece secured over the top of said tube and provided with a mirror set at an angle to the axis of the tube, said head piece having an opening opposite said mirror, with a glass plate closing said opening, and means for maln'ng and breaking the electric circuit through said lamp, substantially as de- 4. Signaling apparatus for use on submarines, comprising a tube projecting above the top of the submarine with means for turning said tube in azimuth, a lamp cham- 5. Signalingapparatus for usev on submarines, comprising a tube projecting above the -top of the submarine with means for turning said tube in azimuth, a lamp chamber mounted beneath said tube, an electric lamp and a concave mirror in said lamp chamber, below said lamp a head piece secured over the top of said tube and provided with a mirror set at 45 to the axis of said tube, and an opening opposite said mirror, with a glass plate closing said opening,

and means for making and breaking the electric circuit through said lamp, substantially as described.

*6. Signaling apparatus for use on submarines comprising a tube projecting above the top of the submarine with means for turning said tube in azimuth, lenses mounted said tube, a lamp chamber mounted beneath said tube, an electriclamp and a concave mirror mounted in said lamp chamber below said lamp, a head piece secured over the top of said tube and provided with a mirror set at 45 to the axis of said tube, and an opening opposite said mirror, with a glass plate closing said opening, and means for making and breaking the electric circuit through said lamp, substantially as described.

' In testimony whereof, we aflix oursignatures.

CHARLES S. BOOKWALTER. FREELAN D A. DAUBIN. 

